Lamp-cord reel.



s A. MAcLEAN.

LAMP CORD REEL. APPucA'rmn HLED um: 23. 19H.

Patented May 18, 1915.

" sures ARCEZBALD BEAGLEAN, OF EW '"ZQRK, ll'. ll.

ise- Sgaecificeticn of Letters iatcnt.

Puleneceilhiuy id, 3915.

Application filed June 23, 1911. Serial No. 6334,9114.

. the follovvin is a s eciiication. b

This invention relates it-o lamp cord reels and the object of the invention is the prcvision of a device of this character whereby a lamp, such as an incandescent lamp, may be conveniently moved around and adjusted while lighted but which cannot be wound up While the lamp is burning, therefore 1'30 re; turn the lamp to normal posiiion it mus-i3 he put out, and to put the lump out releases the holding means and thus perzniis the lamp tov he returned to normal.

A. further object of she invention is she provision of spring operated reel adopted to normally Wind the cord of she lamp thereon and a magnetic clutch controlled by the current passing through ihe cord to prevent the winding operation of i-he reel except when the current turned off from afihe lixm at which time the spring will operate icturn she reel, and Wind up the cord.

Further objects of the invention will ap pear ass-the following specific description is read in connection with ighe accompanying drswings, which form a part ofishis epplication, and in which.

Figure 1 is a vertical sectional elevation of the device. Fig. 2 is e. vertical seciion on line H of Fig.1.

Referring more pcriiculerly to the drewing, 1 represents c frame which coitisis sso'l the side members 2 having lheir upper ends bent iogether and counseled by whole 3. Immediately shove the connection the are provided with an aperture 4: which is adapted lo receive asupporting heel; 5 or supporting device by which the frame and reel are supported. The lower ends of the members connected togeiher and. are supclied with an aperture in which a guide 3 is secured. preferably of insnlct n material. Extending ueross 'lhe sine nu hers, intermdeiaie their-lengih, a chef having izduced and threaded ends 9 which form shoulders 10 adapted to ehu e' ainstthe inner side; of the side pieces undlo form and abutment which is drawn against the frame to olziinp the shaft from rotation by means of the nuts ll which are threaded upon the ends 9. Surrounding the si s.

and lying against the inner side of the side members are spacing rings or c'cshcrs m and keyed to the shaft, adjacent fihe rings 12 are hall race mcmhers l3 hcving hull races ll formed therein to receive the anti-friction balls 15.-

Loosely mounted. upon the hub is a. reel or drum 16 consisting Of'lll'lfi'fillfil members 17 and the circular tube 18 which reeis upon the annular shoulders 19 formed upon the end members and is secured thereto by the screws 20. The end members 1? are pro vided with inwardly extending cup members 2i. which form recesses adapted to receive bhe hall cups 22 which here hell races 23 therein to receive one-half of the enizi-fric tion balls 15. Secured to the shaft end to the drum e its oppcsilc ends is a spiral spring 24 which is placed under tension when the cord is drawn ofi' oi the drum, as will hereineriler hedescrihctl.

Mounted the frame and insulated there from by ihe .25 are suieehlc cerniinalposfis 26 to which lhe separate Wires 2? and 28 of she main are connecied. These posts are provided with recesses and waited Within the recesses are spring pressed carbon brushes 29 which are .icrced inl o engagemenl with the collector 30 and 31 carried upon an insulated ring 82 and connected to the conductor cable or cord 33 by binding posts 34 and35, thus comieciing the wire 2? to the binding posi; 34k and ilie Wire 28 to the binding post 35.

The wire 28 includes lhe coil 38 on an iron clad electromagnet whose core 3? and we ing surround the 9 are secured thereto by means of head 39 connected to ihe cup member 21, by screws Keyed he the shall- 9 so to .rcicic therewith is e clutch disk or armature ll which is normally held away fr m the core and. by

XDGBZLIIS of u non-inngneiiic spring which is overcome when ihe msgnet ci'iergiied.

In. iahe cperaiicn of the device the lump cord or cable is "lied ow, through iche insulated guide '5. us unwinding the reel. ll hen, adjust-ed lo the required degree the lamp lighted end she current passing through the coil of the inngfnet energizes the same and :liJlJIZiCiZ-S the clutch disk or ermmurc 41, thuslccking the reel or drum $20 the shaft. The lump may be lighted before unrceling the cord if found lo be necessary and the same unwound against the, friction of ihe contacting surfaces of the core, shell and armature. The spring is not of snflicient strength, however, to wind up the reel until the magnet has beeen denergized,'at which time the springefl will disengage the clutch from the magnet when the latter will be free to revolve with the drum under the influence of the spring 24. If necessary small non-magnetic studs 36' may be fixed in either the core, shell or armature so as to prevent actual contact of these parts and thereby permit immediate release of the same when tl1e=magnet is deenergized. It is believed best, in practice, to employ this means of release because otherwise the core and shell will hold the armature even after the magnet has been deenergized, both holding suflicient permanent magnetism to prevent immediate release without these precautions.

Having thus described the invent on,

. whatI claim as new is In alamp cord reel, a stationary shaft, a drum'loose on said shaft, an electromagnetic end of said magnet and the side wall of said drum, a shell surrounding said magnet and projecting outwardly beyond the pole face thereof, an armature disk splined on said shaft for sliding movement and disposed within the influence of the pole of said magnet and adapted to engage the adjacent edge of the extended end of said shell, whereby a recess is formed between the pole of the magnet and the adjacent face of said disk, and a coiled expansionspring within the space so formed and acting to force the disk away from the magnet upon the deenergization of the latter.

In testimony whereof I ailix my signature in presence of two witnesses.

' ARGHIBALD MACLEAN.

Witnesses: l

J AMES MAoLnAis, Emu HIGGINS. 

